feat(instrumentation-net): support net.* semconv migration

[trentm]

This adds support for using OTEL_SEMCONV_STABILITY_OPT_IN for controlled migration to stable net.* semconv. The net.* attributes are controlled by the http[/dup] token in OTEL_SEMCONV_STABILITY_OPT_IN (as discussed here).

Refs: open-telemetry/opentelemetry-js#5663

[trentm]

Note: The tls.* attributes added to "tls-connect" spans are all waay out of date. It was added while tls.* semconv was being discussed. The currently TLS semconv has somewhat different values. However, as similar to this PR to instr-amqplib the tls.* semconv are not stable so we cannot use OTEL_SEMCONV_STABILITY_OPT_IN=http to handle the migration of those attributes.

These should still be updated, IMO. I have some notes on that. It is a TODO on me to open an issue for that.